MAIN CAST - Park Shin Hye (22 years old ladies , beautiful , very pretty with angelic face , pure ,childish , innocent , bestfriend of Jung Seung Ho , Lee Hong Ki and Yoon Shi Yoon ,bubble personality , kind herted , strong heart , dont know how to jealous, hates Jung Yong hwa , did not reconize her feeling for Yonghwa)- Jung Yong Hwa (26 years old  , very handsome and good looking , kind , cold-hearted to Shin hye , workholic , struggle hard , older brother of Jung Seung Ho , have owns compony , one of billion air in korea , rich , jerk , likes to command people around him , easy jealousy , did not reconize his feeling toward Shin hye , always thinks negative to Shin hye , habits bullying Shin hye)OTHER CAST- Lee Min Ho (28 years old , fall in love with Shin hye in first meeting , kind , Yong hwa arrival , good looking , handsome , playboy , but changes after met Shin hye , one of billion air , try to catch Shin bye attention)- Jung Seung Ho ( 22 years old , younger brother in  Jung family , act childish , bestfriend Shin hye , Lee Hong ki and Yoon Shi yoon , loves shin hye as friend , care about her , one accident makes shin hye live in Jungs house , always cause problem to Shin hye )- Seo Joo Hyun ( 26 years old ladies , hard inlove withYonghwa ,workholic , always try her best to catch Yonghwa attention , Yonghwa partner in bussiness , hates Shin hye , beautiful but les attitude , fake , act kind-hearted , Jung family hates her , act nice and caring infront Jung family , well known as Miss Mushy Pushy by Yonghwa brother and sister)SUPPORTING CAST- Jung family (Mrs Jung , Mr Jung , Jung Eunji , Jung Soojung (as Krystal) and Jung Soyeon (as Jessica)- Lee Hong Ki (22 years old , Shin hye , Seung ho and Shi yoon bestie)- Yoon Shi Yoon ( 22 years old , Shin hye , Seung ho and Hong ki bestie) ForewordPARK SHIN HYE , girl with mystery background, live in her bestfriend house , JUNG SEUNG HO , because of one tragedy . Live with Jung family , the family with full of love makes her felt like she lost her family .JUNG YONG HWA , the older brother of JUNG SEUNG HO . Always thinks negative about Shin hye makes her lives worst . Yonghwa or was called Annoying Comander by Shin hye always disturb her lives with  his instruction and ridiculous action . Shin hye always patient with his annoying attitude ."Why is it that my reproductive part always become your point of attack?!!" - JUNG YONG HWA"Sorry , your mouth deserve it" -PARK SHIN HYELoves comes without planning . Shin hye very surprise to know Annoying Comander actually have heart for her . Dating ? Too far . With her mother advise , Shin hye accept Yong hwa proposal . Yonghwa propose Shin hye in urgent situation makes all people the hell surprise including Shin hye .